EP2270577A1 - Verfahren und Vorrichtung zur Erzeugung einer Oberfläche einer optischen Linse - Google Patents
Verfahren und Vorrichtung zur Erzeugung einer Oberfläche einer optischen Linse Download PDFInfo
- Publication number
- EP2270577A1 EP2270577A1 EP09305634A EP09305634A EP2270577A1 EP 2270577 A1 EP2270577 A1 EP 2270577A1 EP 09305634 A EP09305634 A EP 09305634A EP 09305634 A EP09305634 A EP 09305634A EP 2270577 A1 EP2270577 A1 EP 2270577A1
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- EP
- European Patent Office
- Prior art keywords
- difference data
- optical
- optical lens
- ini
- lens
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 230000003287 optical effect Effects 0.000 title claims abstract description 75
- 238000000034 method Methods 0.000 title claims abstract description 40
- 238000004519 manufacturing process Methods 0.000 claims description 8
- 238000004590 computer program Methods 0.000 claims description 6
- 230000000750 progressive effect Effects 0.000 description 20
- 230000004438 eyesight Effects 0.000 description 14
- 230000006870 function Effects 0.000 description 13
- 238000000638 solvent extraction Methods 0.000 description 13
- 208000001491 myopia Diseases 0.000 description 11
- 238000013461 design Methods 0.000 description 7
- 238000004364 calculation method Methods 0.000 description 6
- 230000015654 memory Effects 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- 201000009310 astigmatism Diseases 0.000 description 5
- 230000007547 defect Effects 0.000 description 3
- 239000002344 surface layer Substances 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 2
- 238000000354 decomposition reaction Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 238000010200 validation analysis Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000004422 calculation algorithm Methods 0.000 description 1
- 230000001427 coherent effect Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02C—SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
- G02C7/00—Optical parts
- G02C7/02—Lenses; Lens systems ; Methods of designing lenses
- G02C7/06—Lenses; Lens systems ; Methods of designing lenses bifocal; multifocal ; progressive
- G02C7/061—Spectacle lenses with progressively varying focal power
-
- G—PHYSICS
- G02—OPTICS
- G02C—SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
- G02C2202/00—Generic optical aspects applicable to one or more of the subgroups of G02C7/00
- G02C2202/08—Series of lenses, lens blanks
Definitions
- the present invention relates to a method of and an apparatus for generating a surface of an optical lens.
- the invention further relates to a method of and an apparatus for manufacturing an optical lens according to the surface generated by the method of the invention.
- Multifocal ophthalmic lenses are a type of ophthalmic lens which in practice often comprise an aspherical face, and a face, which is spherical or toric, machined to match the lens to the wearer's prescription.
- Progressive ophthalmic lenses usually comprise a far vision region, a near vision region, and a progressive corridor (or channel) there between.
- the progressive corridor provides a gradual power progression from the far vision zone to the near vision zone without a dividing line or a prismatic jump.
- the power in the various far, intermediate and near vision regions is determined by the prescription.
- a prescription may for example define lens characteristics such as a power value for near vision, a power value for far vision, an addition, and possibly an astigmatism value with its axis and prism.
- the dispensing of a particular progressive addition lens to a wearer involves selecting a progressive addition lens design from a range of available progressive addition lens designs based on certain visual requirements of the wearer.
- a semi-finished lens blank having suitable optical characteristics is selected based on a prescription.
- the semi-finished progressive lens blank comprises a front progressive multifocal surface and a back spherical surface.
- the back surface of the semi-finished lens blank is then machined and polished to match the far-vision prescription.
- An alternative method for producing multifocal progressive lenses uses less expensive single vision semi-finished lens blanks having a front spherical surface and a back spherical surface. Based on the optical lens parameters including prescription parameters and other wearer parameters, a single vision semi-finished lens blank having a suitable optical power is selected. A progressive surface design is then computed, for example obtained by optimisation, in accordance with optical lens parameters, and the back surface of the lens blank is machined and polished to produce the desired progressive surface. Although less expensive, this method for producing multifocal progressive lenses is relatively time consuming, partly due to the computational complexity of computing the progressive surface for each prescription.
- the optimisation of an ophthalmic lens involves determining coefficients ⁇ of a surface equation S( ⁇ ) for defining a surface layer of one of the surfaces of the lens according to optical lens parameters denoted as ⁇ .
- a lens surface may be composed of one or more surface layers and thus defined by one or more surface equations.
- Optical lens parameters include wearing parameters A including optical prescription data such as prescribed values defining surface characteristics including sphere, cylinder, axe, prism power, addition, progression length etc; personalisation parameters, environmental factors, positioning parameters etc; for the wearing of the optical lens.
- the surface equation coefficients ⁇ are determined such that a function F ⁇ ( ⁇ ) known as a merit function and which represents the optical defects of an optical lens, is kept to a minimum.
- constraints may include prescription constraints relating to the near vision NV and the far vision FV zone or to lens thickness constraints, and the like.
- the function F ⁇ ( ⁇ ) is not continuous in variables A.
- the base curves chart which is an allocation law of the curvature radius of one of the surfaces of the lens can introduce discontinuities to the function F ⁇ ( ⁇ )
- the method according to a first aspect of the invention enables the time for calculation of a customised surface of an optical lens according to a prescription to be reduced. Moreover the method allows the complete geometry of any customised lens associated with a given prescription to be provided without having to perform a full optimisation process for that particular prescription. From a predetermined set of optimised lenses corresponding to a set of prescriptions, an interpolation of the predetermined optimised surface equations leads to the generation of a desired target surface, an approximated target surface, which otherwise would have been optimised according to the conventional methods. Thus the method according to the invention enables lens information to be provided rapidly to an optician.
- a method of manufacturing an optical lens surface comprising generating an optical surface S ⁇ ( ⁇ ) according to the methods of the invention and a step of manufacturing the optical surface according to the optical surface S ⁇ ( ⁇ ) generated.
- Embodiments of the present invention may include apparatuses for performing the operations herein.
- This apparatus may be specially constructed for the desired purposes, or it may comprise a general purpose computer or Digital Signal Processor ("DSP") selectively activated or reconfigured by a computer program stored in the computer.
- DSP Digital Signal Processor
- Such a computer program may be stored in a computer readable storage medium, such as, but is not limited to, any type of disk including floppy disks, optical disks, CD-ROMs, magnetic-optical disks, read-only memories (ROMs), random access memories (RAMs) electrically programmable read-only memories (EPROMs), electrically erasable and programmable read only memories (EEPROMs), magnetic or optical cards, or any other type of media suitable for storing electronic instructions, and capable of being coupled to a computer system bus.
- a computer readable storage medium such as, but is not limited to, any type of disk including floppy disks, optical disks, CD-ROMs, magnetic-optical disks, read-only memories (ROMs), random access memories (RAMs) electrically programmable read-only memories (EPROMs), electrically erasable and programmable read only memories (EEPROMs), magnetic or optical cards, or any other type of media suitable for storing electronic instructions, and capable of being coupled to a computer system bus.
- the surfaces may be calculated according to surface calculation methods known in the art, such as for example that described in European patent EP990939 which is incorporated herein by reference thereto.
- the first difference data E( ⁇ j ) or optimised difference data is stored in a database from which it can be accessed for subsequent steps of the method.
- the condition w j ⁇ ⁇ 0 if ⁇ j ⁇ O ⁇ ensures that the interpolation will be performed on a continuous function.
- the method according to the embodiment of the invention includes two main operations.
- a further operation of the method according to embodiments of the invention involves defining a rule for constructing weighting coefficients w j ⁇ ⁇ for the step of interpolation.
- a preliminary step of the method according to certain embodiments of the invention may include changing the parameters ⁇ in order to work in conditions better adapted to the step of interpolation.
- parameters ⁇ instead of working with prescription variables sphere, cylinder and axe, it may be more suitable in some cases to work with optical power in 3 particular optical directions, horizontal, vertical and diagonal.
- the idea is to mesh the sub-sets O i sufficiently finely in order to obtain a more reliable approximation for obtaining the target surface.
- Example of suitable polytopes include:
- the set of optical lens parameters can be partitioned into triangles according to (sph, cyl) i values and into intervals along the dimensions consecrated to the axe and the addition.
- the decomposition of an n-polytope into an association of n-simplexes respects the condition that the intersection between two distinct simplexes is either empty or is one of the (n-d) simplex cells (d ⁇ 1) of one of the 2 simplexes.
- optical lens parameters ⁇ are characterised by Far Vision FV prescription parameters of sphere, cylinder and axe values, and addition values.
- optical lens parameters ⁇ lie in a sub-space of 4 dimensions. If further parameters such as personalisation parameters are added, the parameter space will have additional dimensions.
- the set of parameters ( sph,cyl ) i represents the subset of prescription data (sph,cyl) associated with the i ème base.
- the interval [0,180[ corresponds to the axe intervals and the interval [0.75,4] corresponds to the addition intervals.
- each of the sub-sets ( sph,cyl ) i is connected; i.e. they are not partitioned into disjointed parts and are polygons in the plane.
- the partitioning of subsets O i into polytopes is carried out in two steps. In one step the subsets are partitioned by triangles in (sph, cyl) and in another step the intervals associated with the axe and addition are partitioned into sub-intervals.
- the gap in values that can be seen on the graphical representations correspond to the different base changes; i.e. to the discontinuities of the optimisation solutions.
- FIG. 3 is a graphical representation of a plane of prescription parameters of sphere value versus cylinder value and illustrates the manner in which the plane of prescription parameters is partitioned into triangles.
- Each section pattern represents a base partitioned into 2 or 3 triangles by lines.
- the representative prescriptions for validating the partitioning are shown in Figure 4 .
- the maximum differences in sphere and cylinder values between the optimised surface difference data and the approximated surface difference data observed at the control points (PRP, MC, FV, NV) was found to be 0.05 D. This may be deemed as being sufficient. In order that this may be reduced a finer partitioning may be used.
- Partitioning according to addition values can be carried out in a similar manner to partitioning according to axe values.
- sub intervals of [0.75, 4.0] necessary for appropriately fitting the curves of sphere difference values and cylinder difference values at the control points as a function of the addition par straight segments are defined per base.
- Figures 11 and 12 illustrate surface maps of sphere and cylinder values for optimised difference data and the difference data approximated for a given prescritpion and for an addition of 1.75D.
- the partitioning of the optical lens parameters space into polytopes can be performed satisfacly or automatically.
- a database of predetermined optimised surfaces may be built up over time and prescription labs may share surface data which has already been optimised.
- the methods according to embodiments of the invention thus enable the calculation time for calculating a target optical surface to be reduced. This in turn enables information such as lens thicknesses to be provided more quickly to an optician without the need for a full optimisation process to be implemented for each lens prescription.
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- Health & Medical Sciences (AREA)
- Ophthalmology & Optometry (AREA)
- Physics & Mathematics (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Eyeglasses (AREA)
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP09305634A EP2270577A1 (de) | 2009-06-30 | 2009-06-30 | Verfahren und Vorrichtung zur Erzeugung einer Oberfläche einer optischen Linse |
| EP10726517A EP2449420A1 (de) | 2009-06-30 | 2010-06-29 | Verfahren und vorrichtung zur erzeugung einer oberfläche einer optischen linse |
| US13/381,702 US9002491B2 (en) | 2009-06-30 | 2010-06-29 | Method and apparatus for generating a surface of an optical lens |
| PCT/EP2010/059235 WO2011000846A1 (en) | 2009-06-30 | 2010-06-29 | Method of and apparatus for generating a surface of an optical lens |
| CN201080038355.XA CN102483525B (zh) | 2009-06-30 | 2010-06-29 | 形成光学透镜表面的方法和设备 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP09305634A EP2270577A1 (de) | 2009-06-30 | 2009-06-30 | Verfahren und Vorrichtung zur Erzeugung einer Oberfläche einer optischen Linse |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP2270577A1 true EP2270577A1 (de) | 2011-01-05 |
Family
ID=41401691
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP09305634A Withdrawn EP2270577A1 (de) | 2009-06-30 | 2009-06-30 | Verfahren und Vorrichtung zur Erzeugung einer Oberfläche einer optischen Linse |
| EP10726517A Withdrawn EP2449420A1 (de) | 2009-06-30 | 2010-06-29 | Verfahren und vorrichtung zur erzeugung einer oberfläche einer optischen linse |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP10726517A Withdrawn EP2449420A1 (de) | 2009-06-30 | 2010-06-29 | Verfahren und vorrichtung zur erzeugung einer oberfläche einer optischen linse |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US9002491B2 (de) |
| EP (2) | EP2270577A1 (de) |
| CN (1) | CN102483525B (de) |
| WO (1) | WO2011000846A1 (de) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113867818A (zh) * | 2021-09-28 | 2021-12-31 | 潍柴动力股份有限公司 | 一种ini文件的生成方法、装置、计算机设备及介质 |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2810756C (en) * | 2012-03-30 | 2020-01-14 | Johnson & Johnson Vision Care, Inc. | Contour form control |
| DE102020004840A1 (de) | 2020-08-07 | 2022-02-10 | Rodenstock Gmbh | Verbesserte Berechnung ophthalmischer Linsen |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0132955A2 (de) * | 1983-07-22 | 1985-02-13 | Sola International Holdings, Ltd. | Ophthalmische Linse |
| EP0295849A2 (de) * | 1987-06-19 | 1988-12-21 | Sola International Holdings, Ltd. | Progressive Linse und Verfahren zu ihrer Herstellung |
| EP0990939A1 (de) | 1998-09-28 | 2000-04-05 | Essilor International Compagnie Generale D'optique | Torische ophthalmische Linsen |
| EP1004918A1 (de) * | 1998-06-12 | 2000-05-31 | Seiko Epson Corporation | Linse mit progressiver brechkraft |
| WO2000052517A1 (en) * | 1999-03-04 | 2000-09-08 | Shamir Optical Industry | Method for the design of multifocal optical elements |
| WO2001092948A1 (en) * | 2000-06-01 | 2001-12-06 | Inray Ltd. | Wavefront method for designing optical elements |
| WO2007017766A2 (en) | 2005-08-11 | 2007-02-15 | Essilor International (Compagnie Generale D'optique) | Method of manufacturing an optical system |
Family Cites Families (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4787733A (en) * | 1986-11-24 | 1988-11-29 | Polycore Optical Pte Ltd | Method for designing progressive addition lenses |
| CN1162747A (zh) * | 1995-05-04 | 1997-10-22 | 庄臣及庄臣视力产品有限公司 | 多焦眼用透镜 |
| WO2003102671A1 (en) * | 2002-05-31 | 2003-12-11 | Crossbows Optical Limited | Progressive addition power lens |
| DE10313275A1 (de) * | 2003-03-24 | 2004-10-14 | Rodenstock Gmbh | Verfahren zum Berechnen eines individuellen Progressivglases |
| US7125118B2 (en) * | 2003-04-02 | 2006-10-24 | Seiko Epson Corporation | Progressive multifocal lens and method of designing the same |
| JP4225204B2 (ja) * | 2004-01-19 | 2009-02-18 | セイコーエプソン株式会社 | 設計データの提供方法及び設計データの提供システム |
| JP4225205B2 (ja) * | 2004-01-19 | 2009-02-18 | セイコーエプソン株式会社 | 設計データの生成システム、設計データの生成方法、記録媒体及びプログラム |
| ES2217987B1 (es) * | 2004-05-05 | 2005-10-16 | Indo Internacional S.A. | Procedimiento para el calculo de una lente oftalmica y lente correspondiente. |
| JP2008058576A (ja) * | 2006-08-31 | 2008-03-13 | Seiko Epson Corp | 眼鏡レンズの設計方法 |
| FR2906621B1 (fr) * | 2006-09-28 | 2008-11-28 | Essilor Int | Procede de determination d'une lentille ophtalmique |
| FR2910136B1 (fr) * | 2006-12-18 | 2009-02-27 | Essilor Int | Procede de correction de la geometrie d'une couche palpee approchant un brin longitudinal d'un drageoir de monture de lunettes et procede d'acquisition de la geometrie d'un contour d'un tel drageoir |
| FR2910645B1 (fr) * | 2006-12-22 | 2009-07-03 | Essilor Int | Procede de determination d'une lentille ophtalmique. |
| US8535114B2 (en) * | 2008-07-02 | 2013-09-17 | Tokai Optical Co., Ltd. | Method for manufacturing a precursor lens for a rim-shaped lens |
| DE102009005206A1 (de) * | 2009-01-20 | 2010-07-22 | Rodenstock Gmbh | Variables Gleitsichtglasdesign |
| DE102010049168A1 (de) * | 2010-10-21 | 2012-04-26 | Rodenstock Gmbh | Verordnungs- und individualisierungsabhängige Modifikation des temporalen peripheren Sollastigmatismus und Anpassung der Objektabstandsfunktion an veränderte Objektabstände für die Nähe und/oder die Ferne |
-
2009
- 2009-06-30 EP EP09305634A patent/EP2270577A1/de not_active Withdrawn
-
2010
- 2010-06-29 EP EP10726517A patent/EP2449420A1/de not_active Withdrawn
- 2010-06-29 WO PCT/EP2010/059235 patent/WO2011000846A1/en not_active Ceased
- 2010-06-29 CN CN201080038355.XA patent/CN102483525B/zh active Active
- 2010-06-29 US US13/381,702 patent/US9002491B2/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0132955A2 (de) * | 1983-07-22 | 1985-02-13 | Sola International Holdings, Ltd. | Ophthalmische Linse |
| US4676610A (en) * | 1983-07-22 | 1987-06-30 | Sola International Holdings Ltd. | Method of making progressive lens surface and resulting article |
| EP0295849A2 (de) * | 1987-06-19 | 1988-12-21 | Sola International Holdings, Ltd. | Progressive Linse und Verfahren zu ihrer Herstellung |
| EP1004918A1 (de) * | 1998-06-12 | 2000-05-31 | Seiko Epson Corporation | Linse mit progressiver brechkraft |
| EP0990939A1 (de) | 1998-09-28 | 2000-04-05 | Essilor International Compagnie Generale D'optique | Torische ophthalmische Linsen |
| WO2000052517A1 (en) * | 1999-03-04 | 2000-09-08 | Shamir Optical Industry | Method for the design of multifocal optical elements |
| WO2001092948A1 (en) * | 2000-06-01 | 2001-12-06 | Inray Ltd. | Wavefront method for designing optical elements |
| WO2007017766A2 (en) | 2005-08-11 | 2007-02-15 | Essilor International (Compagnie Generale D'optique) | Method of manufacturing an optical system |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113867818A (zh) * | 2021-09-28 | 2021-12-31 | 潍柴动力股份有限公司 | 一种ini文件的生成方法、装置、计算机设备及介质 |
| CN113867818B (zh) * | 2021-09-28 | 2024-04-16 | 潍柴动力股份有限公司 | 一种ini文件的生成方法、装置、计算机设备及介质 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102483525A (zh) | 2012-05-30 |
| EP2449420A1 (de) | 2012-05-09 |
| CN102483525B (zh) | 2015-10-14 |
| US9002491B2 (en) | 2015-04-07 |
| US20120101618A1 (en) | 2012-04-26 |
| WO2011000846A1 (en) | 2011-01-06 |
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